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1 j <br /> T . <br /> CASE NARRATIVE <br /> H <br /> 41 <br /> Prepared For: <br /> C <br /> Bob Cochran E <br /> Chevron Products Company <br /> 6001 Bollinger Canyon Road C <br /> Building L <br /> P.O. Box 6004 <br /> San Ramon, CA 94583-0904 { <br /> Prepared By: <br /> Lancaster Laboratories <br /> 2425 New Holland Pike <br /> Lancaster, PA 1.7605-2425 <br /> SAMPLE GROUP <br /> r <br /> The sample group for this submittal is 783175. Samples arrived at the laboratory <br /> on Saturday, October 20, 2001. <br /> METHODOLOGY <br /> The specific methodologies used in obtaining the enclosed analytical results are <br /> indicated on the laboratory chronicles. <br /> COMMENTS <br /> Poor surrogate recoveries were observed for samples MW-2-40', MW-2-65', MW- 4 <br /> 3-25', MW-3-35' and MW-3-60' from Facility 208118 for the GC/MS volatile <br /> fraction. The analysis was repeated and poor surrogate recoveries were again <br /> observed indicating significant matrix effects. <br />